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The relative safety of brass, copper, and steel gauzes in miners' flame safety-lamps

Are flame safety lamps suitable for detecting petroleum vapors?

Permissible single-shot blasting units

How leakage of current from an electric shot-firing circuit causes misfires

Laboratory and field tests of a permissible indicating methane detector

The overheating of rubber-sheathed trailing cables

Do fuses protect against methane ignition?

The splicing of rubber-sheathed trailing cables

Rubber-Sheathed Trailing Cables

Evolution of methane detecting devices for coal mines

Dry cells and their application to mining

Factors that decrease the light of electric cap lamps

Special multiple-shot blasting units

Maintaining the permissibility of electric cap lamps

The improved permissible flame safety lamps

Behavior of flame safety lamps in mine atmospheres deficient in oxygen

Permissible methane detectors

Lighting practices in coal mines of the United States

Fuel for permissible flame safety lamps

Permissible blasting units

Permissible methane detectors

Investigations of Permissible Electric Mine Lamps, 1930-40

Permissible mine equipment approved during 1944

Fuel for permissible flame safety lamps :(a revision of RI 3389)

Permissible mine equipment approved to January 1, 1947 :with appended list of available flame-lamp fuels

Permissible mine equipment approved during the calendar year 1947 :supplement to Information Circular 7432


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